Sure, feel free to post in the V4L forum, and we'd be glad to see if we can help.
My advice is when screwing the cart on, you will notice holes in the battery, and grooves on the cart. When you tighten the cartomizer on the battery, line up the holes to the grooves.
Then, slow, long drags. If you are using a manual battery, ya gotta hit the button first. If the battery lights do not come on, that could be the issue.
Lastly, ignore trolls like ol' Props here. He's the only thing in this forum that's bad for your health. He likes to think he's helpful, but he's really just a douche.